Which of the following apparently makes the greatest contribution to the phenomenon of optical illusions?

A) misjudgment of depth
B) retinal disparity
C) the fact that the image of an object is inverted on the retina
D) tension on the eye muscles

Retinal Disparity

The difference in visual images that each eye perceives because of the eyes' different positions, a cue used for depth perception in binocular vision.

Optical Illusions

Visual tricks that deceive the eye, making the viewer perceive something differently from its actual reality.

Eye Muscles

The group of muscles surrounding the eye that allow for its movement and the ability to focus on different objects.